Bug 359262

Summary:	Using right-click menu causes garbled unuseable display
Product:	[Plasma] kwin	Reporter:	kdebuac.rhn
Component:	decorations	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	crash
Priority:	NOR
Version:	5.5.3
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	output of `qdbus org.kde.KWin /KWin supportInformation`

Description kdebuac.rhn 2016-02-11 08:40:15 UTC

After opening the alt+F3 menu with right-click on a maximixed window and then moving the mouse pointer to one of sub-menus (e.g. Activities), contents of the screen stop updating arbitrarily, resulting in an unuseable mess.
Kwin needs to be restarted to fix this (alt+F2 and blindly type kwin --replace).

Reproducible: Always

Steps to Reproduce:
1. Maximize a window
2. Right-click on the top decoration
3. Move pointer on the menu to display a submenu
4. Move pointer over the submenu 

Actual Results:  
Windows become confused and seemingly random buffers are shown on any action.

Expected Results:  
The cursor is over submenu and nothing else happens.

Intel 4000 graphics.

Comment 1 Martin Flöser 2016-02-11 09:06:00 UTC

can you screenshot this?

Please also provide output of:
qdbus org.kde.KWin /KWin supportInformation

Comment 2 kdebuac.rhn 2016-02-11 09:51:52 UTC

Created attachment 97144 [details]
output of `qdbus org.kde.KWin /KWin supportInformation`

Comment 3 kdebuac.rhn 2016-02-11 10:00:00 UTC

No, the screenshots aren't garbled, however the floating submenu stays on the screenshot.
I don't think a static image captures the nature of this error: alt-tabbing momentarily gets the display correct most of the time.

Comment 4 Thomas Lübking 2016-02-11 11:38:17 UTC

Is the maximization relevant?
Does it also happen with the breeze decoration?
Why do you use a (dated) git version of MESA?
Is it on glamor, sna or uxa acceleration (see /var/log/Xorg.0.log)

Does it also happen if you run
   KWIN_TRIPLE_BUFFER=1 kwin_x11 --replace &

Comment 5 kdebuac.rhn 2016-02-11 20:52:44 UTC

Actually, maximization doesn't matter.
Breeze is what I was using, not sure about Oxygen.
This mesa version seems to be the Fedora one: mesa-dri-drivers.x86_64              10.6.9-1.20151008.fc22
I'm using SNA: [    22.886] (II) intel(0): SNA initialized with Ivybridge (gen7, gt2) backend
No, it doesn't seem to happen with KWIN_TRIPLE_BUFFER=1

With triple buffer, it becomes obvious, that I'm (additionally?) hitting https://bugs.kde.org/show_bug.cgi?id=351112

Comment 6 Thomas Lübking 2016-02-11 21:07:44 UTC

By "decoration" i meant the titlebar (you're currently using aurorae/plastik)

Because of the TB condition, this is most likely a dupe of bug #358646 - If you should encounter the problem despite the export, please re-open the bug.

*** This bug has been marked as a duplicate of bug 358646 ***